Schwinn S.C. 7 Service Manual page 8

9. Use a 13mm open-ended wrench to loosen the belt idler
tension spring.
10. Use a 3mm allen key to remove the screw connecting the
idler to the tensioner arm.
11. Carefully walk the belt off of the tensioner pulley then walk
the belt off of the crank pulley.
12. Use a 3mm allen key and a 13mm open-ended wrench to
remove the two (2) screws and nuts connecting the cross
brace to the front right fork. Repeat this step for the other
side.
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